CN109442464B - Double-offset rotary feeding valve biomass feeding system and feeding method - Google Patents
Double-offset rotary feeding valve biomass feeding system and feeding method Download PDFInfo
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- CN109442464B CN109442464B CN201811095414.1A CN201811095414A CN109442464B CN 109442464 B CN109442464 B CN 109442464B CN 201811095414 A CN201811095414 A CN 201811095414A CN 109442464 B CN109442464 B CN 109442464B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
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Abstract
A biomass feeding system with a double offset rotary feeding valve and a feeding method. The existing biomass feeding system has two problems of blockage of the feeding system and backflow of high-temperature flue gas. The invention comprises the following components: rotatory feed valve of one-level offset (1) and the rotatory feed valve of second grade offset (3), the rotatory feed valve of one-level offset the export with the rotatory feed valve entrance of second grade offset be linked together, intercommunication department (9) set up pressure balance pipe (2), the rotatory feed valve of one-level offset with the rotatory feed valve of second grade offset all be connected by casing (10) and rotation the inside rotatory blanking ware (8) of casing constitute, rotatory blanking ware include the center pin and fix the epaxial a set of rotatory paddle (5) of center, rotatory paddle keep away from the one end of center pin be fixed with flexible gasket (4). The invention discloses a biomass feeding system with a double-offset rotary feeding valve and a feeding method.
Description
The technical field is as follows:
the invention relates to a biomass feeding system with a double-offset rotary feeding valve and a feeding method.
Background art:
the biomass power generation technology is an energy-saving and environment-friendly advanced power generation technology, and is divided into a biomass direct-fired power generation technology, a biomass mixed-fired power generation technology and a biomass gasification power generation technology according to a technical route, the three biomass power generation technologies have high requirements on the stability and the safety of a biomass feeding system, and if the biomass feeding system has the problems of blockage, high-temperature flue gas backflow and the like, the operation of a biomass incinerator or a biomass gasifier can be influenced, and safety accidents such as ignition and even explosion of the feeding system can be caused.
The existing biomass feeding system has two problems: (1) blocking a feeding system: most biomass power generation systems require feeding continuity, and if a blockage phenomenon occurs, the working condition of a biomass incinerator or a biomass gasification furnace is greatly fluctuated and even the furnace is shut down, so that irreparable loss is caused to production; (2) high-temperature flue gas reflux: for some boilers with frequent pressure fluctuation, particularly for positive pressure furnaces, if the tightness of a feeding system is poor, the phenomenon that high-temperature flue gas in the furnace flows back to the feeding system is likely to occur, so that biomass materials are ignited, and the feeding system is burned or even exploded.
The invention content is as follows:
the invention aims to solve the problems of feeding system blockage and high-temperature flue gas backflow in the conventional feeding system, and provides a biomass feeding system with a double-offset rotary feeding valve and a feeding method, wherein the double-offset rotary feeding valve is used for preventing blockage and ensuring sealing.
The above purpose is realized by the following technical scheme:
a double-offset rotary feeding valve biomass feeding system comprises: the outlet of the first-level offset rotary feeding valve is communicated with the inlet of the second-level offset rotary feeding valve, a pressure balance pipe is arranged at the communication position, the first-level offset rotary feeding valve and the second-level offset rotary feeding valve are connected with a rotary blanking device inside the shell through a shell and a rotation, the rotary blanking device comprises a central shaft and a group of rotary paddles fixed on the central shaft, and a flexible sealing sheet is fixed at one end, far away from the central shaft, of each rotary paddle.
The biomass feeding system with the double offset rotary feeding valves is characterized in that a transition slope is arranged at the joint of a blanking port of the first-stage offset rotary feeding valve and the shell.
The biomass feeding system with the double offset rotary feeding valves is characterized in that the number of the rotary blades on the central shaft is 4-8.
The double-offset rotary feeding valve biomass feeding system has the advantage that the spread angle of the transition slope is 15-30 degrees.
A method of feeding a dual offset rotary feed valve biomass feed system, the method comprising the steps of: the biomass material falls into through the blanking mouth on the feed valve casing, form the compartment between every two adjacent rotatory paddles, the biomass material falls into in the compartment, along with the rotation of rotatory paddle, the compartment is rotatory to the rotatory feed valve exit of one-level offset formula and gets into the rotatory feed valve of second grade offset formula, let in 1-10 Kpa's gas in the rotatory feed valve of one-level offset formula and the rotatory feed valve intercommunication department of second grade offset formula, the rotatory feed valve of one-level offset formula is clockwise rotation, the rotatory feed valve of second grade offset formula is anticlockwise rotation, the biomass material passes through the discharge gate discharge through the rotatory feed valve of second grade offset formula, so the circulation is reciprocal and is realized continuous feed.
Has the advantages that:
1. the system is simple and reliable, stable in feeding, wide in material applicability and suitable for rice hulls, biomass briquettes, biomass particles and the like.
2. The invention adopts double sealing of the buffer chamber pressurization and the offset rotary feeding valve, has good sealing performance and is suitable for a positive pressure feeding system with higher requirement on sealing performance.
3. The blanking port is eccentrically arranged at one side of the upward direction of the rotating blade, and the connecting part of the blanking port and the shell is provided with the transition slope, so that the phenomenon that the matching point of the rotating blade and the shell is too close to a blanking area to cause the jamming of materials at the matching point is avoided.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. a first-stage offset rotary feed valve; 2. a pressure balance tube; 3. a second-stage offset rotary feed valve; 4. a flexible sealing sheet; 5. rotating the paddle; 6. a blanking port; 7. a discharge port; 8. rotating the blanking device; 9. a communication part; 10. a housing; 11. a transition slope.
The specific implementation mode is as follows:
example 1:
a double-offset rotary feeding valve biomass feeding system comprises: the rotary feeding valve comprises a first-stage offset rotary feeding valve 1 and a second-stage offset rotary feeding valve 3, wherein an outlet of the first-stage offset rotary feeding valve is communicated with an inlet of the second-stage offset rotary feeding valve, a pressure balance pipe 2 is arranged at a communication part 9, the first-stage offset rotary feeding valve and the second-stage offset rotary feeding valve are both formed by a shell 10 and a rotary blanking device 8 which is rotatably connected inside the shell, the rotary blanking device comprises a central shaft and a group of rotary paddles 5 which are fixed on the central shaft, and one end, far away from the central shaft, of each rotary paddle is fixedly provided with a flexible sealing sheet 4.
The eccentric one side of setting ascending at rotatory paddle of blanking mouth, and the feeding valve casing opening angle that the blanking mouth corresponds is 40~80, can guarantee that every compartment can not fill whole compartment after rotatory blanking district, ordinary rotatory feeding valve is because the compartment is piled up the material after the blanking district, it can form the bite because of overflowing of material to continue rotatory to agreeing with the department with the casing at the paddle, compare with this, the rotatory feeding valve of off-set living beings is because the material is not full of the compartment and then this problem can not appear, the blanking mouth is equipped with the transition slope with the casing junction, avoid the paddle too close blanking district with the agreeing with of point of casing, lead to the material to cause the bite in agreeing with the point department.
The tail ends of the rotating blades of the first-stage offset rotary feeding valve and the second-stage offset rotary feeding valve are connected with the flexible sealing sheet, and the flexible sealing sheet is tightly contacted with the shell to ensure the sealing of the feeding valve. Meanwhile, the flexible sealing sheet has strong plasticity, and the joint of the sealing sheet and the shell is prevented from being blocked.
A pressure balance pipe is arranged at the joint of the first-stage offset rotary feeding valve and the second-stage offset rotary feeding valve, and the pressure at the joint is maintained through the gas of 1-10Kpa and the exhaust gas, so that the sealing of the whole feeding system is ensured, and meanwhile, the backflow of high-temperature flue gas is prevented.
Example 2:
according to the biomass feeding system with the double offset rotary feeding valves in the embodiment 1, the junction between the blanking port 6 and the shell of the one-stage offset rotary feeding valve is provided with the transition slope 11.
Example 3:
the biomass feeding system with the double offset rotary feeding valves according to the embodiment 1 or 2, wherein the number of the rotary paddles on the central shaft is 4-8.
Example 4:
the double offset rotary feed valve biomass feed system according to embodiments 1 or 2 or 3, wherein the transition ramp has an angle of divergence of 15-30 °.
Example 5:
a method of feeding a dual offset rotary feed valve biomass feed system, the method comprising the steps of: the biomass material falls into through the blanking mouth on the feed valve casing, form the compartment between every two adjacent rotatory paddles, the biomass material falls into in the compartment, along with the rotation of rotatory paddle, the compartment is rotatory to the rotatory feed valve exit of one-level offset formula and gets into the rotatory feed valve of second grade offset formula, let in 1-10 Kpa's gas in the rotatory feed valve of one-level offset formula and the rotatory feed valve intercommunication department of second grade offset formula, the rotatory feed valve of one-level offset formula is clockwise rotation, the rotatory feed valve of second grade offset formula is anticlockwise rotation, the biomass material passes through the discharge gate discharge through the rotatory feed valve of second grade offset formula, so the circulation is reciprocal and is realized continuous feed.
Claims (3)
1. A double-offset rotary feeding valve biomass feeding system comprises: rotatory feed valve of one-level offset and rotatory feed valve of second grade offset, characterized by: the outlet of the first-stage offset rotary feeding valve is communicated with the inlet of the second-stage offset rotary feeding valve, a pressure balance pipe is arranged at the communication position, the first-stage offset rotary feeding valve and the second-stage offset rotary feeding valve are both composed of a shell and a rotary blanking device which is rotatably connected inside the shell, the rotary blanking device comprises a central shaft and a group of rotary blades which are fixed on the central shaft, one ends of the rotary blades, far away from the central shaft, are fixedly provided with flexible sealing pieces, a compartment is formed between every two adjacent rotary blades, and the compartment is a sealed compartment;
a transition slope is arranged at the joint of the blanking port of the first-stage offset rotary feeding valve and the shell;
the spread angle of the transition slope is 15-30 degrees.
2. The dual offset rotary feed valve biomass feed system of claim 1, wherein: the number of the rotating blades on the central shaft is 4-8.
3. A method of feeding a biomass feeding system with a double offset rotary feeding valve according to claim 1 or 2, characterized by: the method comprises the following steps: the biomass material falls into through the blanking mouth on the feed valve casing, form the compartment between every two adjacent rotatory paddles, the biomass material falls into in the compartment, along with the rotation of rotatory paddle, the compartment is rotatory to the rotatory feed valve exit of one-level offset formula and gets into the rotatory feed valve of second grade offset formula, let in 1-10 Kpa's gas in the rotatory feed valve of one-level offset formula and the rotatory feed valve intercommunication department of second grade offset formula, the rotatory feed valve of one-level offset formula is clockwise rotation, the rotatory feed valve of second grade offset formula is anticlockwise rotation, the biomass material passes through the discharge gate discharge through the rotatory feed valve of second grade offset formula, so the circulation is reciprocal and is realized continuous feed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811095414.1A CN109442464B (en) | 2018-09-20 | 2018-09-20 | Double-offset rotary feeding valve biomass feeding system and feeding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811095414.1A CN109442464B (en) | 2018-09-20 | 2018-09-20 | Double-offset rotary feeding valve biomass feeding system and feeding method |
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| CN109442464A CN109442464A (en) | 2019-03-08 |
| CN109442464B true CN109442464B (en) | 2020-06-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102005040399A1 (en) * | 2005-08-25 | 2007-03-01 | Maschinenfabrik Rieter Ag | Flake feed system |
| CN201454411U (en) * | 2009-06-04 | 2010-05-12 | 哈尔滨电站设备成套设计研究所 | Calcium spraying desulphurization metering power feeding device |
| ITUB20152439A1 (en) * | 2015-07-23 | 2017-01-23 | Colombo Giovanni S R L | CRUSHER MILL |
| CN206509047U (en) * | 2017-01-17 | 2017-09-22 | 云南绿生中药科技股份有限公司 | A kind of Chinese herbal medicine grade grinder |
| CN207674478U (en) * | 2017-08-16 | 2018-07-31 | 上海工业锅炉有限公司 | A kind of proportioner for biomass fuel front-furnace feeding |
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